x86: cros_ec: Enable cros_ec for link

Add defines to enable the Chrome OS EC interface and set it up on init.

Signed-off-by: Simon Glass <sjg@chromium.org>

board/chromebook-x86/coreboot/Makefile

@@ -12,4 +12,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-y	+= coreboot_start.o
+obj-y	+= coreboot_start.o coreboot.o

board/chromebook-x86/coreboot/coreboot.c

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2013 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <cros_ec.h>
+
+int arch_early_init_r(void)
+{
+	if (cros_ec_board_init())
+		return -1;
+
+	return 0;
+}

include/configs/coreboot.h

@@ -283,6 +283,11 @@
  */
 #define CONFIG_PCI
 
+#define CONFIG_CROS_EC
+#define CONFIG_CROS_EC_LPC
+#define CONFIG_CMD_CROS_EC
+#define CONFIG_ARCH_EARLY_INIT_R
+
 /*-----------------------------------------------------------------------
  * USB configuration
  */